Basic and fundamental parallelohedra of crystalline substances

Abstract

In the article “Results of the first stage of the experimental study of the structure of crystals,” the main parallelohedron denotes the smallest parallelohedron with the arrangements of atoms marked in it, from which the entire system of atoms is derived through the elements of bond symmetry. In the system of atoms there are therefore several different orientations of the main parallelohedrons with their atoms, and precisely by the magnitude of the bond symmetry (see article).